Lecture 11

Question 1

How do endotherms thermoregulate?

Answer 1

internal heat source, high metabolic rate and body temp

Question 2

How do ectotherms thermoregulate?

Answer 2

external heat source, low metabolic rate and body temp

Question 3

What is hemothermy?

Answer 3

regulator, constant with a range of environmental temperatures

Question 4

What is poikilothermy?

Answer 4

conformer, changing with environmental temperatures

Question 5

Ectotherm body temperature is primarily a result of:

Answer 5

internal heat as a by-product of cell respiration, external interaction to heat obtain from respiratory activity, external influences, insulated body heat from metabolic activity, internal exothermic reactions at the body surface

Question 6

What is the chemical energy used to directly power cellular activity in all living organisms?

Answer 6

ATP

Question 7

How is ATP produced?

Answer 7

Through cellular respiration

Question 8

Do platelets, red blood cells, or white blood cells transport oxygen?

Answer 8

Red blood cells transport oxygen from the lungs to body tissues, and participate in transporting carbon dioxide from tissues to lungs

Question 9

What are characteristics of red blood cells?

Answer 9

carry hemoglobin, lack nucleus, carry oxygen to cells

Question 10

During pulmonary circulation blood leaves the _______ventricle and moves to the lungs.

Answer 10

Right

Question 11

What is diastole?

Answer 11

whole heart is relaxed

Question 12

What is systole?

Answer 12

heart contraction

Question 13

What is tachycardia?

Answer 13

faster rate

Question 14

What is bradycardia?

Answer 14

slower rate

Question 15

What is Arrhythmia?

Answer 15

Irregular Rate

Question 16

What is peripheral vasoconstriction?

Answer 16

Restriction of circulation to vital capillary beds (brain & heart) circulation to muscles

Question 17

Would tachycardia result from massive loss of blood?

Answer 17

Yes

Question 18

Would tachycardia result from taking a challenging exam?

Answer 18

Yes

Question 19

Would tachycardia result from immersion of your face in cold water?

Answer 19

No

Question 20

Would tachycardia result from running fast to class?

Answer 20

Yes

Question 21

Usual blood pressure reading

Answer 21

140/90

Question 22

How is blood pressure read?

Answer 22

Systolic over diastolic

Question 23

When does systolic pressure occur?

Answer 23

when the ventricles contract

Question 24

When does diastolic pressure occur?

Answer 24

when the ventricles relax and the heart refills with blood

Question 25

What is used to read the blood pressure?

Answer 25

Sphygmomanometer

Question 26

During ventricular relaxation, you will measure the ______ pressure.

Answer 26

diastolic

Question 27

What determines blood pressure?

Answer 27

elasticity of blood vessel walls, strength of ventricle contraction, rate of pumping, blood volume

Question 28

What reduces elasticity of blood vessel walls?

Answer 28

arteriosclerosis

Question 29

Would lowering the volume of the blood in the arteries and veins decrease blood pressure?

Answer 29

Yes

Question 30

Would the heart rate increasing decrease blood pressure?

Answer 30

No

Question 31

Would forcefulness of the heart’s contractions increasing decrease blood pressure?

Answer 31

No

Question 32

Would pumping more blood through the heart decrease blood pressure?

Answer 32

No

Question 33

Would the arterioles narrowing decrease blood pressure?

Answer 33

No