females FSH targets ovaries(1)–> follicle development (1)

males: LH targets interstitial cells (1)–> testtosterone production (1)

females: LH affects corpus luteum (1) –> secrete progesterone (1)

LH spike promotes ovulation (1)

any five response for 5 marks

2.  aldosterone causes increased sodium reabsorption from DCT (1)

water follows raising blood volume (1)

increase in blood volume–>increase BP (1)  –> increase in BP forces more water into interstitial spaces (1)

increase in BV decreases osmotic pressure (1) –> decrease in tissue fluid reabsorption (1)

any four  for 4 marks

3.

• Calcium ions move into the cell.
• They interact with contractile proteins and pull the vesicles to the
surface of the presynaptic membrane.
• The vesicles merge with the presynaptic membrane and release
neurotransmitters into the synaptic cleft.
• The neurotransmitters diffuse across the cleft.
• The neurotransmitters fit into receptor sites, causing the postsynaptic
membrane to depolarize.

any 4 for 4 marks

4.

• increased concentration of carbon dioxide (CO2 )
• increased concentration of bicarbonate ions (HCO3
– )
• increased acidity
• decreased concentration of oxygen (O2 )

any 3 for 3 marks

5.

• Salivary amylase digests starch.
• Pancreatic amylase digests starch. } either one for
1 mark
AND
• starch –> maltose (1 mark)
• maltase digests maltose (1 mark)
• maltose –> glucose (1 mark)

6.

a.  (FROM TOP RIGHT CLOCKWISE DIRECTION)

DISTAL TUBULE

COLLECTING DUCT

DESCENDING LOOP OF HENLE

BOWMANS CAPSULE

EFFERENT ARTERIOLE

b.  1) ADH:

thirst centre responds to high solute concentration–> sends message to posterior pituitary to secrete ADH–> ADH makes distal and collecting tubule more permeable to water–> reabsorption of water by peritubular caps–>increase in BV and BP

7.

mouth and nose moist to trap dust and particulate

nasal passages lined with hair to trap particulate

rigid tubes prevent collapse

mucous secreted from cells that line trachea to trap dust and other particulate

cilia actively sweep mucous and trapped particulate up to pharynx

]]> https://biology12.wordpress.com/2009/06/11/short-answer/feed/ 1 574 Malcolm https://biology12.wordpress.com/2009/06/11/mcq-key-for-practice-exam/ https://biology12.wordpress.com/2009/06/11/mcq-key-for-practice-exam/#respond Thu, 11 Jun 2009 18:01:10 +0000 http://biology12.wordpress.com/?p=571

sHORT aNSWER WILL BE UP IN THE NEXT HOUR

this is a neat site.  do it.

http://www.biology-study-guides.com/12_testyourself.html

here are the notes:   C.11NERVOUS C

read…use the text as reference…use the web…check out the sites linked to this page.

mr c

ps  quiz on PNS and CNS next class (MONDAY)

Wed May 27 – 10 for 10 practice review quiz FROM UNIT 1 AND 2  (the CELL, TRANSPORT OF MOLECULES WITHIN CELL)

(10 MINUTES…FOR 10 -15 QUESTIONS)  –

GOAL?–

1)   TO REMIND YOU OF WHAT WE HAVE LEARNED IN THE PAST

2)   TO SEE HOW YOUR KNOWLEDGE RETENTION IS ON THE TOPIC

3)   TO GIVE A GOOD IDEA OF WHAT CAN BE STUDIED

– FINISH NOTES/LECTURE ON  NEURON, ACTION POTENTIAL, NEUROTRANSMITTERS

Sun May 31 – Sunday School open for business–a place to study 12pm to 3pm

Mon June 1

1)  QUIZ ON CNS AND PNS (FOR MARKS)

2)  HAND OUT PRACTICE FINAL

3)  wrap up any loose ends on nervous system

4)  10 for 10 practice review quiz  UNIT 3 – BIOCHEMISTRY

Wed June 3

1)  10 for 10 quiz on Unit 4 and 5 (DNA AND PROTEIN SYNTHESIS)

2)  OPEN STUDY DIRECTED AT UNITS ON ENZYMES, DIGESTION, CIRCULATION

Fri June 5 – Study

1)  CONTINUE STUDY:  HUMAN BODY

Sun June 7 -Sunday School open for business–a place to study 12pm to 3pm

Mon June 8

1) 10 for 10 practice review quiz  (DIGESTION AND CIRCULATION)

2)  CONTINUED STUDY :  HUMAN BODY – FOCUS ON LAST 3 UNITS

Wed June 10

1)  10 for 10 practice review quiz  (rESPIRATION, EXCRETION, REPRO?)

2)  FINAL STUDY – FOCUS ON LAST 3 UNITS

June 12:  Biolgy 12 school based exam

70%  Term 3 cumulative (respiration, excretion, reproduction, nervous system)

30 % term 1 and term 2 (bio-molecules–>circulation)

**I will be giving you a practice final that will mirror the yearend Bio Exam

June 22:  Biology 12 Provincial exam

——————————————————————————————————————————–

Monday may 25 – Introduction to nervous system notes/lecture

Wed May 27 – 10 for 10 practice review quiz

Sun May 31 – Sunday School open for business–a place to study 12pm to 3pm

Mon June 1 -10 for 10 practice review quiz

Wed June 3 -10 for 10 practice review quiz

Fri June 5 – Study

Sun June 7 -Sunday School open for business–a place to study 12pm to 3pm

Mon June 8 -10 for 10 practice review quiz

Wed June 10 -10 for 10 practice review quiz

nervous system C.12 NOTES

There will be one more set of notes to come on the neuron and action potential.