BI Lab Final

Juxtaglomerular cells are part of which structure in the nephron?

Afferent arterioles

Which is not considered part of the nephron?

ureters

A male with bushy eyebrows (Homozygous recessive: bb) and a cleft chin (Homozygous Dominant: CC) has children with a women who is heterozygous for both traits (BbCc). What would be the expected phenotypic ratio of their children for these traits?

50% cleft chin with bushy eyebrows; 50% cleft chin with fine eyebrows

Which of the following choices correctly traces the route of glomerular filtrate on its path to the collecting duct of a nephron?

Bowman's capsule, proximal tubule, descending loop of Henle, ascending loop of Henle, distal tubule

Which structures are responsible for maintaining levels of estrogen earlier and later in pregnancy?

Corpus luteum earlier and placenta later

Which hormonal change is linked with the menses period of uterine cycle?

Decreased levels of progesterone and estrogen

What is the correct trajectory of sperm during ejaculation?

Epididymis, vas deferens, ampulla of vas deferens, ejaculatory duct, urethra

What path do bile salts take?

Liver, gall bladder, duodenum, jejunum, ileum, liver

Lymph from which of the following parts of the body does not enter into the systemic circulation through the thoracic duct?

Lymph from the right arm

Mature T-lymphocytes accumulate at which of the following organs, where they play a central role in the adaptive immune response?

Lymph nodes

Which of the following is not a basic function of the lymphatic system?

Maintenance of blood pressure

During human meiosis and fertilization which cells are diploid?

Primary spermatocyte, primary oocyte, and zygote.

Which hormone is consistently positively correlated with thickening of the endometrium?

Progesterone

In humans, which meiotic phase has the longest duration?

Prophase I in females

Which of the following anatomical portion of a nephron connects the Bowman's capsule to the loop of Henle?

Proximal convoluted tubule

The lining of lymphatic vessels is composed of which of the following cell type?

Simple squamous epithelium

Lymph from the right lymphatic duct enters the systemic circulation at what point?

The junction of the right subclavian vein and the jugular vein

The renal system does not play a direct role in regulating which of the following?

blood temperature

The ______ stores bile and releases it through a tube into the small intestine.

gall bladder

Which process in the third week of development converts the embryonic disc into the trilaminar embryo?

gastrulation

Presence of which of the following in the urine, even in small amounts, is indicative of a possible problem in the renal system of a patient?

glucose

Pregnancy tests generally are based upon the detection in maternal urine of:

human Chorionic Gonadotrophin

Alleles segregate independently of other alleles because:

maternal and paternal chromosomes line up randomly on either side of the equator during metaphase I

Where does mechanical and chemical digestion begin?

mouth

Which organ of the digestive system produces enzymes that break down starches, protein and fats?

pancreas

Which is the organ where most of the chemical digestion takes place and nutrients are absorbed?

small intestine

This organ continues mechanical digestion and secretes gastric juices that continue chemical digestion.

stomach

Blood vessels, lymphatics and nerves enter the kidney through?

the hilum

Which process take place in the large intestine?

water is absorbed from undigested food waste

All of the following are produced by meiosis except:

zygote

Which of the following best describes the immediate fate of high-molecular weights proteins that are removed from the interstitial spaces of the body and taken up by the lymphatic system?

Emptying into the circulatory system at the jugular vein

Which of the following is not a commonality shared by large lymph vessels and cardiovascular veins (veins of the cardiovascular system)?

Forms a closed system

A plant breeder wants to create flowers with all red petals. The genotype of the flower that she has is Rr. Which of the following genotypes should she use to make sure that all the petals of the offspring are red?

RR

What would be a direct result of an enzymatic deficiency on the acrosome?

Sperm cannot penetrate the corona radiata

What is the correct trajectory of sperm from site of seminiferous tubules to spongy urethra?

Straight tubules, rete testis, efferent ductules, epididymis ductus, vas deferens, ejaculatory duct, prostatic urethra, membranous urethra