1. based on the image above of an alveolus, in which direction will carbon dioxide diffuse? c to a a to c d to b b to d 2. in an enzyme-substrate reaction, what does vmax refer to? the maximum speed at which product is converted to substrate the maximum speed at which substrate is converted to product the maximum concentration of product produced by the reaction the maximum concentration of substrate consumed by the reaction

1. Answer;

B to D

Explanation;

The diagram shows the site of gaseous exchange in the lungs called alveoli.

Oxygen and carbon dioxide move from where there is a large concentration to where there is a lower concentration.

Carbon dioxide from the blood moves out of the capillaries into the alveoli, then exhilarated out of the body through the nostrils.

Oxygen diffuses from the alveoli, into the blood in the capillaries, then taken to the heart through the pulmonary vein, and then transported to all parts of the body.

2. Answer;

The maximum speed at which substrate is converted to product

Explanation;

Vmax is the rate of reaction when the enzyme is saturated with substrate,it is the maximum rate of reaction.

Vmax depends on the structure the enzyme itself and the concentration of enzyme present.

hormones in blood stream

image: dtc.ucsf.edu

endocrine glands secrete hormones into the blood stream near them; the hormones then travel in our bloodstream until it reaches its destination, called a target cell, in distance parts of the body. in the target tissue, hormones lock onto the target’s plasma membrane, called the receptor site.

answer: the blood-brain barrier is a layer of specialized membranes and cell processes designed to keep undesirable substances from passing from the bloodstream into the precious tissues of the brain. while the blood-brain barrier does keep most bad things out of the central nervous system, it is not impermeable.

explanation: