QUESTION 21 Macroscopically, a kidney is composed of the: renal cortex renal med

Question

QUESTION 21

Macroscopically, a kidney is composed of the:

renal cortex

renal medulla

renal pelvis

renal cortex and medulla

renal cortex, medulla, and pelvis

3 points   

QUESTION 22

The cellular process that requires two nuclear divisions, resulting in cells with half of the parent chromosomal number is:

mitosis

meiosis

apoptosis

synapsis

3 points   

QUESTION 23

When the diaphragm contracts, the pressure in the thoracic cavity:

increases

decreases

stays the same

3 points   

QUESTION 24

The diaphragm is:

a muscle

the floor of the chest cavity

involved in breathing

All of the choices are correct.

3 points   

QUESTION 25

If pregnancy does not occur, the:

corpus luteum regresses

endometrium thickens

endometrium breaks down

both corpus luteum regresses and endometrium breaks down

3 points   

QUESTION 26

In mitosis, once separated from their sister, individual chromatids are called:

centromeres

centrioles

chromosomes

autosomes

gametes

3 points   

QUESTION 27

Kidneys maintain the electrolyte balance in the body. The term electrolyte refers to:

carbonate-bicarbonate

urea-uric acid

acid-base

water-salt

3 points   

QUESTION 28

The extension of the soft palate is called the:

epiglottis

adenoid

hard palate

uvula

3 points   

QUESTION 29

The urinary system helps regulate:

water content of the body

blood volume of the body

pH of the blood

All of the choices are correct.

3 points   

QUESTION 30

The thick soupy acidic liquid that leaves the stomach is called:

mucus

chyme

mesenchyme

bolus

renal cortex

renal medulla

renal pelvis

renal cortex and medulla

renal cortex, medulla, and pelvis

Explanation / Answer

1. Macroscopically, a kidney has three parts. The outer part is called cortex. Deep in the cortex is second part called medulla. The innermost part of the kidney is renal pelvis. So, the correct answer is option e.

2. Meiosis is a process of production of four haploid indiviuals. So, the correct answer is option b.

3. Contraction of the diaphragm makes it flatten up, which causes an increase in volume of thoracic cavity. The pressure inside lungs diminishes and hence air rushes inside the lungs. So, the correct answer is option b.

4. A diaphragm is a muscle which is dome shaped present on the surface of thoracic cavity. It aids in breathing. So, the correct answer is option D.

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