Question 41 Which division of the autonomic nervous system i

Question 41

Which division of the autonomic nervous system increases heart rate?

sympathetic system

parasympathetic system

3 points

Question 42

Which of the following processes produces 2 ATP, 6 NADH, and 2 FADH2 after 2 turns?

glycolysis

citric acid cycle

electron transport system

3 points

Question 43

Aged red blood cells are destroyed in the:

red bone marrow

lungs

lymph nodes

spleen and liver

3 points

Question 44

Enzymes belong to which group of organic molecules:

carbohydrates

proteins

lipids

nuclei acids

3 points

Question 45

Both the SA and AV node are located in the:

left atrium

left ventricle

right atrium

right ventricle

3 points (Extra Credit)

Question 46

An increased risk for cardiovascular health problems is associated with

an elevated level of hemoglobin.

high blood levels of HDLs.

decreased production of albumins.

high blood levels of LDLs.

low blood levels of LDLs.

3 points

Question 47

Following severe injury to tissues or a heart attack, the number of circulating white blood cells called monocytes greatly increase in number. Where did these cells come from?

red bone marrow

yellow bone marrow

spleen

heart

lymphatic nodes

3 points

Question 48

Foreign cells that enter our body have unique cell surface proteins, known as ________, which stimulate our body\'s defense to attack.

leukocytes

Rh factors

antibodies

platelets

antigens

3 points

Question 49

Which of the following components of blood increase in number in response to the presence of an infectious agent?

clotting factors

albumins

white blood cells

red blood cells

platelets

3 points

Question 50

Which of the following occurs first in the process of hemostasis?

blood clotting

production of fibrin

formation of a platelet plug

vascular spasm

destruction of calcium ions

3 points

Question 51

Which of the following is true regarding the \"recycling\" of hemoglobin?

The peptide chains are broken down into their constituent fatty acids.

The iron atoms are returned to the red bone marrow.

The heme groups are converted to urine by the kidneys.

The peptide chains are transported intact to the bone marrow for reuse.

The heme groups with their iron atoms are transported to the spleen.

3 points

Question 52

Hair and nails are hardened and water-proofed by the protein:

hemoglobin

fibrinogen

collagen

keratin

		sympathetic system
		parasympathetic system

Solution

41.The correct answer is:sympathetic system

Reason:Sympathetic system increases the heart rate while parasympathetic system decreases the heart rate.

42.The correct answer is:citric acid cycle.

Reason: Citric acid cycle produces 2 ATP, 6 NADH, and 2 FADH2 after 2 turns.

43.The corret answer is:spleen and liver

Reason: Spleen and liver destroy old RBCs.

44.The correct answer is:Proteins

Reasons:All enzymes are proteins.

45.The correct answer is:right atrium

Reason: The SA node is present on the upper part and AV node on the floor of right atrium.

46.The correct answer is:high blood levels of LDLs.

Reason: LDLs are known as bad cholesterol that increase the chances of heart attack.

47.The correct answer is:spleen

Reason:Spleen contains the monocytes.

48.The correct answer is:antigens

Reason: Antigens present on the surface of pathogens elicit immune response in our body.

49.The correct answer is:white blood cells

Reason: WBCs increase in number to fight against the infection.

50.The correct answer is:vascular spasm

Reason:Vascular spasm is the first step that results in constriction of blood vessels so as to reduce loss of blood.

51.The correct answer is:The iron atoms are returned to the red bone marrow.

Reason:The iron atoms can either be used by the cells or can be returned to red bone marrow for recycling.

52.The correct answer is: keratin

Reason: Hair and nails are made up of keratin protein.