Question

question 22
which mature cell has no nucleus, mitochondria, or ribosomes?
erythrocyte
leukocyte
platelet
neutrophil
question 23
the normal ecg is composed of all of the following except a
p wave.
qrs complex.
t wave.
e wave.
question 24
the ______ drains much of the superficial leg and foot.
inferior vena cava
popliteal vein
great saphenous vein
internal iliac vein

Explanation:

• Question 22: Erythrocytes (red blood cells) lose their nucleus, mitochondria, and ribosomes during maturation. This allows them to have more space for hemoglobin to carry oxygen. Leukocytes (white blood cells) and neutrophils (a type of leukocyte) have nuclei. Platelets are cell fragments but do not have the same lack of these organelles as mature erythrocytes in terms of the full - fledged cell - organelle relationship as erythrocytes.
• Question 23: A normal electrocardiogram (ECG) consists of the P wave (atrial depolarization), QRS complex (ventricular depolarization), and T wave (ventricular repolarization). There is no E wave in a normal ECG.
• Question 24: The great saphenous vein is the longest vein in the body and drains much of the superficial leg and foot. The inferior vena cava is a large vein that returns blood to the heart from the lower body but is not specifically for superficial leg and foot drainage. The popliteal vein is in the knee region and is more related to deep drainage in that area. The internal iliac vein drains the pelvic region.

Answer:

• Question 22: Erythrocyte
• Question 23: E wave
• Question 24: great saphenous vein