Question

14 multiple choice 10 points when muscle cells work in the absence of oxygen, ____ builds up. lactic acid nitrogen pyruvic acid 15 multiple choice 10 points what factors affect the rate of passive transport? ph, osmotic pressure, atp availability enzyme activity, cell division, gene expression temperature, concentration gradient, size of molecules blood pressure, heart rate, respiratory rate 16 matching 10 points match the genotype to its correct description. bb bb bb homozygous recessive heterozygous homozygous dominant

Explanation:

1. When muscle cells undergo anaerobic respiration (work without oxygen), lactic - acid fermentation occurs, leading to the buildup of lactic acid.
2. Passive transport is the movement of substances across a cell membrane without the use of energy. Temperature affects the kinetic energy of molecules, the concentration gradient drives the movement from high to low concentration, and the size of molecules can impact their ability to pass through the membrane.
3. In genetics, 'bb' represents a homozygous recessive genotype as both alleles are recessive. 'Bb' is heterozygous as it has one dominant and one recessive allele. 'BB' is homozygous dominant as both alleles are dominant.

Answer:

1. A. lactic acid
2. C. Temperature, concentration gradient, size of molecules
3. bb - homozygous recessive; Bb - heterozygous; BB - homozygous dominant