Contemporary Issues in Biology Exam 1 (TCU, Hale) Exam Questions and Answers 2024

Contemporary Issues in Biology Exam 1 (TCU, Hale) Exam Questions and Answers 2024 Scientific Method - Answer- 1. Make Observation 2. Test the Hypothesis 3. Results 4. Submission of paper to scientific journal 5. Peer Review Experimental Group - Answer- The variable being tested is present Control Group - Answer- The variable being tests is absent (placebo) Horned Lizards - Answer- 1. Nearly 100% of diet is harvester ants 2. Threatened species in Texas Pseudo-Sciencec - Answer- A system of hypotheses and theories that are not based uppon scientific methodology. Past Pseudo-Science - Answer- Dietary Supplements Testis - Answer- site of gamete formation and testosterone production. Contains many coiled tubules called seminiferous tubules. located in teh scrotum. Epididymis - Answer- Site of cell maturaion and storage. A chamber sitting on top of each testis. Vas Deferens - Answer- Sperm carrier that loops over the ureters of the urinary system and arrives at the prostate gland during sexual activity. Pathway of Sperm - Answer- 1. Produce in smeniferous tubules in testes 2. Stored in epididymis 3. Vas Deferens 4. Urethra-Seminal Vesicles-Prostate gland- Bulborethral glands (Cowper's Gland) Accessory Glands - Answer- seminal vesicles, prostate gland, bulbourethral glands (Cowper's Gland) Seminal Vesicles - Answer- Mucus and fructose (nourishment for sperm) Prostate Gland - Answer- Thin milky white fluid that contains nutrients for the sperm Cowper's Gland (Bulbourethral) - Answer- Clear lubricating fluid that is alkaline and neutralizes the acid enviroemnt of the penile uretra. Copmosition of Semen - Answer- Sperm from testicles-- Fluid from seminal vesicles-- Fluid from prostate gland--Fluid from Bulbouretral glands (Cowper's Gland) True - Answer- There are, on average 280 million sperm ejacualte, they swim into the fallopian tube within 60 hours and can live for four days. Male Hormones - Answer- The pituitary produces FSH and LH-- These hormones travel though the bloodstream to the testes wehre tehy acuse the cells of teh seminiferous tubules to begin producing the male gametes.--These hormones also stimulate the testes to begin production of testosterone--Testosterone then travels from the testes through the bloodstream where it targets many tissues throughout the body. Testosterone - Answer- Responsible for male secondary characterstics-- Stimulates growth of many body trissues including muscle, bone, and cartillage, as well as influencing male sex bahevaiors and aggresssion. Hormone levels in Men - Answer- testosterone levels increase after 10, peak in the 20's and then decline gradually with age. Normal Prostate - Answer- Size of walnut until about 50 years old, Urethra open Enlarged Prostate - Answer- After 50, can become size of lemon-- Urethra squeezed-- prevents baldder from emptying--Dilates bladder--Dilates ureters Transurethral Resection of Prostate - Answer- A rectoscope is insterted into the penile urethra up to the enlarged prostate. An electrical loop is extended which removes excess prostate tissue, thus opening up the urethral orifice Prostate Cancer - Answer- one in 6 (17%) men will be diagnosed duringtheir lifetime. Lymphatic System - Answer- vessels responsible for returning bodily fluids Digital Rectal Exam - Answer- finger of the hand, starts annually at age 40, can detect stage B prostate cancer