Unit 4 Part B - reproduction + muscles

Question 1

What conveys messages from the central nervous system to an endocrine gland?

Answer 1

Motor neuron

Question 2

What is the order of increasing size of muscle structures?

Answer 2

Sarcomere –> myofibril –> muscle fiber –> muscle

Question 3

What are the features of both endoskeletons of mammals and exoskeleton of insects?

Answer 3

They are both moved by antagonistic sets of muscles

Question 4

What occurs during skeletal muscle contraction?

Answer 4

Calcium ion bind to troponin

Question 5

What is contained in skeletal muscle?

Answer 5

Multinucleate cells w/ numerous microfibrils made of contractile sarcomeres

Question 6

What is the role of calcium ions in muscle contraction?

Answer 6

Unblock myosin binding sites on actin

Question 7

What is a function of luteinizing hormone in female menstrual cycle?

Answer 7

Trigger ovulation

Question 8

What is always needed for seed germination?

Answer 8

oxygen

Question 9

Which statement applies to placenta ?

Answer 9

Carbon dioxide diffuses from fetus to mother across placenta

Question 10

What is the main function of zona Pellucida?

Answer 10

Prevent polyspermy

Question 11

What stage of spermatogenesis produces haploid cells from diploid cells?

Answer 11

Primary spermatocytes to secondary spermatocytes

Question 12

What are the functions of female reproductive hormones?

Answer 12

Estrogen and progesterone promote development of female reproductive organs in embryo

Question 13

What are the molecules that bind to HCG?

Answer 13

HCG antibodies made by modified plasma cells of small mammals

Question 14

What occurs around day 15 of cycle of cycle?

Answer 14

Formation of a corpus luteum

Question 15

Between which days is the woman likey to be fertile?

Answer 15

11-16

Question 16

What is the function of human chorionic gonadotropin?

Answer 16

To stimulate the corpus luteum to produce progestrone during early pregnancy