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Describe the forces that both push material into the tissue across the capillary bed as well as facilitate the reabsorption of fluid at the capillary bed.

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Trinidad Tremblay
Trinidad TremblayLv2
28 Sep 2019

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2.A normal human contains 5 L of blood, approximately 2% of which is resident in the systemic (i.e., non-pulmonary) capillaries at any given time. (1)Assuming that the capillaries are 8 ?m in diameter, estimate the total length of capillaries in the body (excluding the lungs). (2)If an average capillary length is 1 mm, how many capillaries are there in the body? (3)Cardiac output is 5 L/min. Assume that this is evenly distributed throughout a parallel network consisting of the capillaries found in (2), estimate the pressure drop across the capillary bed. Assume Newtonian, laminar flow in the capillaries with ?eff of 3.5 cP. What percentage of the total 85 mmHg systemic pressure drop is this?

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QuestionGroup: #37 CNS

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Which parts of the brain contribute to our social behavior?

A

Orbitofrontal cortex

B

Mirror neurons

C

Amygdala

D

All of these are correct

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QuestionGroup: #38 CNS2

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38

Part of the explanation of long term memory is which of the following?

A

Long term potentiation between neurons and muscle cells

B

Long term potentiation between neurons

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Short term translation

D

Long term transcription

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QuestionGroup: #39 PNS

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39

The somatic component of the peripheral nervous system has which of the following characteristics?

A

It controls the smooth muscle in the blood vessels so that blood vessels can vasoconstrict or vasodilate

B

It controls the autonomic nervous system so it indirectly controls heart rate

C

It controls your skeletal muscle so you can answer this question by pushing on the keyboard

D

It controls the smooth muscle in your intestinal tract so it controls peristalsis

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QuestionGroup: #40 Smooth/skeletal

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40

Which of the following is NOT a part of a skeletal muscle cell?

A

Motor neurons

B

Nuclei

C

Sarcomeres

D

Actin

E

Myosin

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QuestionGroup: #41 Cardio

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41

Which part of the circulatory system has the highest pressure?

A

Veins

B

Capillaries

C

Arteries

D

Aorta

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QuestionGroup: #42 Cardio2

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42

Where do the electrical signals originate in your heart?

A

SA node

B

Internodal tracts

C

His-Purkinje System

D

AV node

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QuestionGroup: #43 Blood pressure

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43

There was a horrific traffic accident and you run to help the victims. You feel a pulse from his carotid artery ,however the medic comes along and gets no blood pressure as he measures it from the arm. He claims the victim is dead. You think which of the following?

A

Medic is not correct since it is the difference between heart rate and blood pressure that determines life. No heart rate only means tha the sympathetics have stopped vasoconstricting the blood vessels.

B

Medic is correct since it is common to not have a blood pressure of 120/80 and no pulse due to stress as was discussed in class.

C

Medic is incorrect since there is a pulse. This means the person is still alive.

D

Medic is correct since there is no blood pressure there is no life.

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QuestionGroup: #44 Blood pressure2

Assigned as

Homework

44

Which side of the capillary bed has the higher oncotic pressure?

A

venous and lymph

B

arterial and lymph

C

lymph

D

venule side

E

arterial side

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QuestionGroup: #45 Capillaries

Assigned as

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45

If the hydrostatic pressure is higher in the interstitial space rather than the capillary, which of the following will occur?

A

(2),(3)

B

(1),(2),(3)

C

(3) Decreased hydrostatic pressure in the arterial end of the capillary

D

(2) Decreased hydrostatic pressure in the venous end of the capillary

E

(1) No change in the hydrostatic pressure since this pressure is maintained regardless of external pressures.

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QuestionGroup: #46 Respiration/ ventilation

Assigned as

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46

The left atrium is damaged and is generating a great resistance to blood coming from pulmonary vein. What happens due to this pressure?

A

Back up of blood in the pulmonary artery which causes pulmonary capillary edema

B

Generation of back flow into the inferior vena cava

C

Generation of coronary artery edema

D

Back up of blood in the pulmonary vein which causes pulmonary capillary edema

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QuestionGroup: #47 Respiration/ventilation 2

Assigned as

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47

Edema in the pulmonary circulation refers to which of the following?

A

additional fluid in the trachea

B

additional interstitial fluid

C

additional surfactant

D

additional capillary fluid

E

additional intracellular fluid

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QuestionGroup: #48 Cell communication

Assigned as

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48

What is the definition of a signaling pathway?

A

All the proteins in the nucleus

B

All the cell molecules in the mitochondria

C

A group of genes that control mitosis

D

A specific chemical pathway that is activated by the ligand/receptor complex.

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QuestionGroup: #49 Hormone/ menstruation

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Homework

49

Which hormone directly causes ovulation?

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Follicle stimulating hormone

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Lutenizing hormone

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Progesterone

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Estrogen

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All of these

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