Log in
Biology
6
answers
0
watching
128
views
15 Apr 2019

Which of the following statements are true about dehydration? Select ALL that apply.

a. Dehydration increases heart rate, skin temperature, and blood viscosity.

b. Dehydration decreases cardiac output, blood plasma volume, and muscle blood flow.

c. Even slight dehydration can result in measurable physiological changes.It's best to hydrate before, during, and after exercise.

d. Dehydration increases stroke volume, central blood volume, and muscle blood flow.

e. All humans sweat at the same rate based on the temperature of their environment.

f. Dehydration helps people regulate their body temperature in hot environments.

Watch
6
answers
0
watching
128
views

For unlimited access to Homework Help, a Homework+ subscription is required.

Unlock all answers

Get 1 free homework help answer.
Already have an account? Log in
Share
Already have an account? Log in
Share
Already have an account? Log in
Share
Already have an account? Log in
Share
Already have an account? Log in
Share
Tod Thiel
Tod ThielLv2
17 Apr 2019
Already have an account? Log in
Share

Related textbook solutions

Molecular Cell Biology
8 Edition,
Lodish
ISBN: 9781464183393
Biology: Science for Life with Physiology
6 Edition,
Belk
ISBN: 9780134555430
Concepts of Biology
OER Edition,
Openstax
ISBN: 9781938168116
Biology
2nd Edition, 2013
Openstax
ISBN: 9781947172517
Essentials of Biology
5 Edition,
Mader
ISBN: 9781259660269

Related questions

Which of the following statements are true about hyperthermia, body temperature, and fatigue? Select ALL that apply.

Select one or more:

a. In general, as relative humidity increases, time to exhaustion decreases.

b. A hydrated person cannot experience hyperthermia.

c. As core body heat increases, blood flow to the skin increases to promote heat loss and reduce body temperature.

d. Warming up before an event allows the body to heat up at a slower rate and decreases the chance of hyperthermia.

e. As core body temperature increases, blood glycogen is broken down faster, sweat rate increases, and the risk of dehydration is greater.

f. Hyperthermia occurs when core body temperature increases past a normal, healthy level.

g. Hyperthermia only occurs in cold environments.

1. Reflexes associated with Golgitendon organs prevent skeletal muscles from

a. stretching toofar

b. contracting with too muchforce

c. accumulating too much lacticacid

d. exercising toolong

2. Why do plasma glucoseconcentrations start to decline after prolonged enduranceexercise?

a. Glucagon releasedecreases.

b. Insulin releaseincreases.

c. Cortisol releasedecreases.

d. Glycogen stores aredepleted.

3. During a graded aerobic exercise,

a. SBP gradually increases while DBP remains same or slightlydecreases.

b. SBP remains same or slightly decreases while DBP graduallyincreases.

4. Factor(s) affecting blood pressure is(are)

a. HR.

b. SV.

c. Q.

d. TPR.

e. All of above.

5. Where does waterportion of sweat come from?

a. Inside of muscle cells.

b. Urine.

c. Plasma.

6. End-diastolic volume (EDV) -end-systolic volume (ESV) =

a. cardiac output(CO).

b. mean arterial pressure(MAP).

c. stroke volume(SV).

d. ejection fraction(EF).

7. The major factor affecting blood flow is

a. viscosity ofblood.

b. length of vessel.

c. radius of vessel.

d. shear stress ofvessel.

8. Accumulation of metabolicby-products in muscle (H+,CO2, heat) leads to

a. vasoconstriction.

b. vasodilation.

c. sympatheticactivation.

d. reduced muscle bloodflow.


9. During a grated exercise until the point ofventilator threshold (VT) occurring,

a. pulmonary ventilation (VE) increases proportionally to exerciseintensity increase.

b. pulmonary ventilation (VE) increases disproportionally toexercise intensity increase.

10. Immediately stopping a steady-statesubmaximal exercise, VE steeply decreases. This decrease is dueto

a. decrease in PCO2, H+, and the coretemperature (metabolic effect).

b. decrease in neural input from CNS and feedback from activemuscle.

11. During the recovery period after asteady-state submaximal exercise, VE gradually decrease because

a. decrease in PCO2, H+, and the coretemperature (metabolic effect).

b. decrease in neural input from CNS and feedback from activemuscle.

12. Valsalvamaneuver is dangerous because

a. sore abdominal muscles.

b. a drop in blood pressure if Valsalva maneuver iscontinued.

c. a dangerous rise in blood pressure immediately afterstarting Valsalva maneuver.

d. b and c are correct.

e. All of above are correct.

13. The point atwhich pulmonary ventilation (VE) increases disproportionately withoxygen consumption (VO2) during graded exercise iscalled

a. ventilatory threshold (VT).

b. lactate threshold (LT).

c. anaerobic threshold (AT).

14. Which condition duringexercise induces the right shift of hemoglobin's oxygen-binding affinity curve(Bohr effect)?

a. ADP accumulation

b. lower pH

c. mechanical compression ofmuscle capillaries

d. local hypoxia(low O2)

15. How is bloodpressure response during submaximal exercise different between armsand legs?

a. Arms have a higher.

b. Legs have a higher.

c. They are the same

d. They can't be compared

16. Which of thefollowing does not increase the heart'sstroke volume?

a. Enhanced cardiac filling and ejection

b. Neurohormonal influence

c. Training adaptations that expand blood volume

d. Training adaptations that increase resistance to bloodflow

17. Which of the following willdecrease stroke volume (SV)?

a. increased preload

b. increasedcontractility

c. increased Calcium(Ca2+) concentrations

d. increasedafterload

18. For two athletes with sameVO2max, An athlete who has _____ lactate thresholdpredicts better performance.

a. higher

b. lower

c. It doesn

Question 1 (1 point)Save Question 1Save
Which of the following will increase blood flow to a given regionof the body?

A smaller pressure gradient between the arteries and thatregion.

Vasoconstriction of the arterioles feeding that region.

An increase in blood viscosity via dehydration.

An increase in diameter of the arterioles feeding the region.
Question 2 (1 point)Save Question 2Save
Which of the following statements pertaining to the innervation ofthe heart is TRUE?

The heart is directly activated by the somatic nervoussystem.

The heart muscle is directly activated by the autonomic nervoussystem.

NE released by sympathetic neurons binds to beta-adrenergicreceptors and increases heart rate.

ACh released by parasympathetic neurons binds to nicotinicreceptors and decreases heart rate.
Question 3 (1 point)Save Question 3Save
The prolonged depolarization in cardiac myocytes is due primarilyto which channel type?

Voltage-gated sodium channels

Voltage-gated potassium channels

Funny (F-type) sodium channels

Long-lasting (L-type) calcium channels
Question 4 (1 point)Save Question 4Save
Which of the following statements about the pacemaker potentialgenerated by the SA node is FALSE?

Its intrinsic rate is about 70 depolarizations per minute.

The rate of depolarization can be affected by autonomicinnervation.

Funny (F-type) sodium channels play a role in the gradualdepolarization.

In the complete absence of extrinsic input (hormones or neurons),the SA node will continue to depolarize
Question 5 (1 point)Save Question 5Save
Match the description in the left hand column with the terms in theright hand column that BEST correspond (one match per term, allselections are used).

The period of the cardiac cycle when the heart is contracting

The period during diastole when the pressure in the atria exceedsthe pressure in the ventricles.

The period during systole when all heart valves are closed.

The difference between end-diastolic volume and end-systolicvolume.

The period of the cardiac cycle when the heart is relaxing.

1.
Systole
2.
Diastole
3.
Stroke volume
4.
Isovolumetric contraction
5.
Ventricular filling

Related Documents

BIO 311C Lecture Notes - Lecture 1: Glycosidic Bond, Atheroma, Dehydration Reaction
whitewildebeest151
BIO-1201 Lecture Notes - Lecture 3: Plutonium-239, Uranium-235, Iodine-131
fuchsiawhale233
BIO 203 Lecture Notes - Lecture 10: Central Nervous System, Peripheral Nervous System, Preterm Birth
emily

Weekly leaderboard

Home
Homework Help 3,900,000
Biology 460,000
Start filling in the gaps now
Log in