1. | Ectoderm | 2. | Mesoderm |
3. | Endoderm | 4. | All three germ layers |
1. | ventricular filling. |
2. | the atrioventricular valves to close, and then the semilunar valves to open. |
3. | the semilunar valves to close, and then the atrioventricular valves to open. |
4. | pressure to become greater in the aorta and pulmonary trunk than in the ventricles. |
1. | Annelids and arthropods | 2. | Annelids and chordates |
3. | Chordates and arthropods | 4. | Mollusks and arthropods |
The functions of the lymphatic system do not include:
1. | The removal of interstitial fluid from tissues |
2. | Transport of factors needed for coagulation of blood |
3. | transport of nutrients and hormones |
4. | Absorption and transport of end products of fat digestion |
The second most common formed elements in the human blood are:
1. | Proteins | 2. | Water |
3. | RBC | 4. | Thrombocytes |
Match each item in Column I with one in Column II and select the correct answer from the codes given:
Column I | Column II | ||
A. | Closure of AV valves | a. | Second heart sound |
B. | Closure of semilunar valves | b. | First heart sound |
C. | Opening of AV valves | c. | Ventricular ejection |
D. | Opening of semilunar valves | d. | Passive ventricular filling |
Codes
A | B | C | D | |
1. | a | b | c | d |
2. | b | a | c | d |
3. | b | a | d | c |
4. | a | b | d | c |
The nodal musculature of the heart has the capability to generate impulse:
1. | on stimulation by the sympathetic division of the autonomic nervous system |
2. | on stimulation by the parasympathetic division of the autonomic nervous system |
3. | on stimulation by the somatic neural division of the peripheral nervous system |
4. | without any external stimulus |
Formed elements and clotting factors are removed from the blood. The remaining fluid will be called as:
1. | Plasma | 2. | Lymph |
3. | Serum | 4. | Antiserum |
The autonomic regulation of cardiac activity is carried out by a neural center located in:
1. | Medulla oblongata | 2. | Hypothalamus |
3. | Cerebrum | 4. | Thalamus |
Match each item in Column I with one in Column II and select the correct answer from the codes given:
Column I | Column II | ||
A. | Mitral valve | a. | Allows blood flow from left atrium to left ventricle |
B. | Papillary muscles | b. | Does not allow back opening of AV valves during ventricular systole |
C. | AV node | c. | Ensure all chambers do not contract simultaneously |
D. | Fibrous band between atrial and ventricular muscle mass | d. | Ensures atria contract before ventricles |
Codes
A | B | C | D | |
1. | a | b | c | d |
2. | b | a | c | d |
3. | b | a | d | c |
4. | a | b | d | c |