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mart [117]
3 years ago
8

Blood pressure is generated byA. Valves in the heart B. Contractions of the heart muscle C. Veins D. Contractions of the diaphra

gm muscle
Biology
2 answers:
Murrr4er [49]3 years ago
8 0

Answer:

B

Explanation:

Blood pressure is the force of the blood pushing against the artery walls.

babymother [125]3 years ago
4 0

Answer:

The answer is B, contractions of the heart muscle.

Explanation:

Basically blood pressure is the pressure in which your blood is pushed away from the heart to the other parts of your body.  So the force in which the heart has to use to pump that blood is the blood pressure.  This is called the systolic pressure.  The harder your heart has to work to pump the blood, the higher your pressure will be.  There's a secondary pressure is called diastolic pressure.  This is the second force where your heart rests between pumps.  So you will have 2 numbers for blood pressure, the systolic and the diastolic.  You want your heart to work as little as possible to pump the blood through your body.

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lubasha [3.4K]

Answer:

Glucose entering the intestines from the villus.This is by active transport.The latter is defined as the movement of molecules and  solutes from the region of lower concentration to the region of higher concentration against the concentration gradient.

Explanation:

All the above options depends on the diffusion gradients from one  higher region to another.e.g oxygen passing from high concentration from outside to lower concentration in blood stream,like wise Co2 from higher concentration from inside to outside,with passive diffusion lipids and water enter the small intestine(note amino acid and glucose,and fructose are different).

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If this were to be moved by  passive diffusion,the high concentration in the intestine will force this back into the villi

Therefore extra energy is needed by active transport for the glucose molecules to enter the intestine from the villus.

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