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N76 [4]
3 years ago
9

Can someone Help plez

Biology
1 answer:
patriot [66]3 years ago
5 0
Puisisih the unit ahh
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Which of the following statements about phospholipids is TRUE? A Option A: Each one has two fatty acid chains and the glycerol b
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Answer:

Each one has two fatty acid chains and the glycerol backbone is bonded to a small polar group.

Explanation:

Phospholipid is a unique form of lipid. The  bonding of the glycerol backbone to the polar phosphate group makes phospholipid to have dual solubility unlike general triglycerides.

 

The polar head is said to be hydrophillic that is <u>water loving,</u> while the two carbon chains  that  retained lipid features are hydrophobic <u>water hating.</u>

Therefore if a phopholipid is placed in water, in relation  to its functions as component of cell membrane, it forms a bi-layer in which the water loving portion hydrophilic head points into the surrounding watery medium, while the hydrophobic layer points inwards far away from the watery medium into the internal cellular  layer to form an impermeable barrier to hydrophilic (polar) substances.

This forms the basis of   the  phospholipd  bilayer  of the  cell membrane. And it  controls the permeability of the cell membrane to  influx  substances  into the cells.

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Which of the following is NOT true regarding the endocrine system?
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In comparative anatomy, the flippers of a seal, feet of a sea otter and fins of a dolphin would be considered __ structures.
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The heart is ____________ to the lungs. The knee is ____________ to the hip. The wrist is ____________ to the hand. The mouth is
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Answer:

This question is asking to identify the directional relationship between the following organs. They are explained below.

Explanation:

1. The heart is MEDIAL to the lungs because it is located towards the middle in relation to the right and left lungs.

2. The knee is DISTAL to the hip because it is farther away from the point of attachment of the hip joint.

3. The wrist is PROXIMAL to the hand because the wrist is closest to the point of origin of the hand.

4. The mouth is INFERIOR to the nose because it is lower in direction to the nose.

5. The thorax is SUPERIOR to the abdomen because it is located above the abdomen.

6. The thumb is DISTAL to the ring finger because it is far away from the ring finger.

7. The sternum is ANTERIOR to the heart because it lies in front of the heart

8. The skull is SUPERFICIAL to the scalp because it is close to the body surface.

9. The ears are LATERAL to the nose because it is towards the middle line of the nose

10. Dorsal refers to the BACK of the human body, while ventral refers to the FRONT of the human body.

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