Exam #2 UMaine BIO 342 Questions with Correct Answers
3 views 0 purchase
Course
Bio 342
Institution
Bio 342
Giant Hogweed description Correct Answer Giant hogweed is a biennial or perennial herb in the carrot family (Apiaceae) that can grow to a height
of 14 feet or more.
Its hollow ridged stems are 2 - 4 inches in diameter and have dark reddish-purple blotches.
Description of giant hogweed
Its larg...
Exam #2 UMaine BIO 342 Questions with Correct
Answers
Giant Hogweed description Correct Answer ✓✓ Giant hogweed is a
biennial or perennial herb in the carrot family (Apiaceae) that can grow
to a height
of 14 feet or more.
Its hollow ridged stems are 2 - 4 inches in diameter and have dark
reddish-purple blotches.
Description of giant hogweed
Its large compound leaves are up to 5 feet wide, and its white flower
heads can be 2.5 feet in diameter.
Giant hogweed effect on humans Correct Answer ✓✓ The sap of giant
hogweed causes severe light-induced dermatitis in humans, resulting in
blisters, long-lasting scars, and even blindness.
• These serious reactions are due to furanocoumarin derivatives in the
leaves, roots, stems, flowers, and seeds of the plant.
Castor bean Correct Answer ✓✓ used for medicinal purposes from the
oil.. ricin toxicity
Deadly nightshade description Correct Answer ✓✓ bell shaped flower
purple with green tinges and a faint scent. the fruits are green berries that
ripen to a shiny black
,Poison ivy description Correct Answer ✓✓ leaves of three let it be..
berries white danger in sight
Poison ivy Reaction Correct Answer ✓✓ contain urushiol.. If poison ivy
is burned and the smoke is inhaled, a dangerous rash may appear in the
lining of the lungs !!
It is a phenolic compound (3-n-pentadecycatechol) that occurs in poison
ivy as an oily resin
Contact dermatitis occurs in people who are allergic to the oleoresin
urushiol in poison ivy.
Urushiol binds to the skin on contact, causing a T-cell mediated immune
response in sensitive humans
serious rash blistering of skin
allergic response to grass pollen Correct Answer ✓✓ During
sensitization to a plant allergen, the body produces the antibody IgE
which binds to special receptors on mast cells (which are now like little
bombs, armed and ready for detonation)
• Upon subsequent exposure to the allergen, the IgE antibodies of mast
cells bind to the protein surface markers of the allergen
• When enough cross-linking occurs, the mast cells explode with
histamine and other inflammatory substances that generate the
symptoms associated with allergic rhinitis and/or asthma
• A late-phase response may follow after several hours as a result of
involvement by immune cells known as eosinophils.
, deadly nightshade allergic reaction Correct Answer ✓✓ Symptoms of
belladonna poisoning include: tachycardia, blurred vision, loss of
balance, staggering, headache, hallucinations, slurred speech, delirium,
and convulsions
Berries pose the greatest danger to children, because they look attractive
and have a somewhat sweet taste. Consumption of two to five berries by
children and ten to twenty berries by adults can be lethal.
• Deadly symptoms are caused by disruption of the parasympathetic
nervous system and its ability to regulate involuntary activities such as
breathing and heart beat.
ragweed Correct Answer ✓✓
goldenrod Correct Answer ✓✓
invasive plants definition Correct Answer ✓✓ An invasive plant is
defined by MNAP (Maine Natural Areas Program) as a plant that is not
native to a particular ecosystem and whose introduction causes
economic or environmental harm or adversely affects human health.
what makes a successful invasive plant Correct Answer ✓✓ • Strong
competitor, stress tolerator, or weedy ruderal - A weedy ruderal is
adapted to disturbed habitats
Able to exploit the absence of natural herbivore and disease pressure
Prolific annual or persistent perennial plants
• Can invade disturbed areas and establish themselves before native
species can grow
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller cracker. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $14.49. You're not tied to anything after your purchase.
