8-3 Mechanisms of Transport. For each of the following statements, answer with a D if the statement is true of simple diffusion, with an F if it is true of facilitated diffusion, and with an A if it is true of active transport. Any, all, or none (N) of the choices may be appropriate for a given statement. (a) Requires the presence of an integral membrane protein (b) Solutes move down their free energy gradient in the direction of thermodynamic equilibrium (c) Is not subject to saturation (d) Requires the hydrolysis of ATP (e) Is a way of establishing a difference in the concentration gradient of solutes across a membrane (f) Applies only to small, nonpolar solutes (g) Applies only to ions (h) Transport can occur in either direction across the membrane, depending on the prevailing concentration gradient (i) Has a positive G (j) Usually has intrinsic directionality

(a) Requires the presence of an integral membrane protein -F

(b) Solutes move down their free energy gradient in the direction of thermodynamic equilibrium - N

(c) Is not subject to saturation - N

(d) Requires the hydrolysis of

ATP - A except secondary active transport

(e) Is a way of establishing a difference in the concentration gradient of solutes across a membrane - D

(f) Applies only to small, nonpolar solutes - D

(g) Applies only to ions - A

(h) Transport can occur in either direction across the membrane, depending on the prevailing concentration gradient - D

(i) Has a positive G(Gradient) - D

(j) Usually has intrinsic directionality

Explanation:

Simple Diffusion is the movement of solutes from a region of higher concentration to a region of lower concentration through a semipermeable membrane.

When then is through a transmenbrane integral protein, it is a facilitated diffusion

Active transport uses chemicals (e.g ATP) to move ions against the concentration gradient (Lower to Higher concentration).

They are two types(Primary and Secondary Active transport). Secondary active transport do not require ATP

fertilization, pictured in figure 24.23a is the process in which gametes (an egg and sperm) fuse to form a zygote. the egg and sperm each contain one set of chromosomes. to ensure that the offspring has only one complete diploid set of chromosomes, only one sperm must fuse with one egg. in mammals, the egg is protected by a layer of extracellular matrix consisting mainly of glycoproteins called the zona pellucida. when a sperm binds to the zona pellucida, a series of biochemical events, called the acrosomal reactions, take place. in placental mammals, the acrosome contains digestive enzymes that initiate the degradation of the glycoprotein matrix protecting the egg and allowing the sperm plasma membrane to fuse with the egg plasma membrane, as illustrated in figure 24.23b. the fusion of these two membranes creates an opening through which the sperm nucleus is transferred into the ovum. the nuclear membranes of the egg and sperm break down and the two haploid genomes condense to form a diploid genome.

explanation:

it would be heredity